@article{uoadl:2988232,
    volume = "20",
    number = "5",
    pages = "266-272",
    journal = "Blood Pressure Monitoring",
    issn = "1359-5237, 1473-5725",
    keywords = "algorithm;  Article;  blood pressure;  blood pressure cuff;  blood pressure measurement;  cardiac equipment;  computer program;  controlled study;  diagnostic accuracy;  diastolic blood pressure;  digital sphygmocorder;  electronics;  human;  mercury sphygmomanometer;  microphone;  pilot study;  priority journal;  recording;  sphygmomanometer;  sphygmomanometry;  stethoscope head;  systolic blood pressure;  validation study;  analog digital converter;  devices;  diastole;  equipment design;  hypertension;  nonparametric test;  observer variation;  oscillometry;  pathophysiology;  pressure;  signal processing;  sound;  stethoscope;  systole;  videorecording, Algorithms;  Analog-Digital Conversion;  Blood Pressure Determination;  Diastole;  Electronics;  Equipment Design;  Humans;  Hypertension;  Observer Variation;  Oscillometry;  Pilot Projects;  Pressure;  Signal Processing, Computer-Assisted;  Sound;  Sphygmomanometers;  Statistics, Nonparametric;  Stethoscopes;  Systole;  Video Recording",
    BIBTEX_ENTRY = "article",
    year = "2015",
    author = "Lee, J. and Chee, Y. and Kim, I. and Karpettas, N. and Kollias, A. and Atkins, N. and Stergiou, G.S. and O'Brien, E.",
    abstract = "Objectives This study describes the development of a new digital sphygmocorder (DS-II), which allows the digital recording and playback of the Korotkoff sounds, together with cuff pressure waveform, and its performance in a pilot validation study. Materials and methods A condenser microphone and stethoscope head detect Korotkoff sounds and an electronic chip, dedicated to audio-signal processing, is used to record high-quality sounds. Systolic and diastolic blood pressure (SBP/DBP) are determined from the recorded signals with an automatic beat detection algorithm that displays the cuff pressure at each beat on the monitor. Recordings of Korotkoff sounds, with the cuff pressure waveforms, and the simultaneous on-site assessments of SBP/DBP were performed during 100 measurements in 10 individuals. The observers reassessed the recorded signals to verify their accuracy and differences were calculated. Results The features of the high-fidelity DS-II, the technical specifications and the assessment procedures utilizing the playback software are described. Interobserver absolute differences (mean ± SD) in measurements were 0.7± 1.1/1.3 ± 1.3 mmHg (SBP/DBP) with a mercury sphygmomanometer and 0.3± 0.9/0.8 ± 1.2 mmHg with the DS-II. The absolute DS-II mercury sphygmomanometer differences were 1.3± 1.9/1.5 ± 1.3 mmHg (SBP/DBP). Conclusion The high-fidelity DS-II device presents satisfactory agreement with simultaneous measurements of blood pressure with a mercury sphygmomanometer. The device will be a valuable methodology for validating new blood pressure measurement technologies and devices. © 2015 Wolters Kluwer Health, Inc. All rights reserved.",
    title = "High-fidelity digital recording and playback sphygmomanometry system: Device description and proof of concept",
    doi = "10.1097/MBP.0000000000000109"
}